familyAsteraceae
tribeAsteraceae tribe Astereae
genusXylorhiza
speciesXylorhiza linearifolia

Xylorhiza linearifolia

(T. J. Watson) G. L. Nesom

Sida 20: 145. 2002.

Guy L. Nesom
Common names: Moab woody-aster
Endemic
Basionym: Xylorhiza glabriuscula var. linearifolia T. J. Watson Brittonia 29: 215. 1977
Synonyms: Machaeranthera linearifolia (T. J. Watson) Cronquist
Treatment appears in FNA Volume 20. Treatment on page 408. Mentioned on page 406.

Subshrubs, 15–35 cm. Stems branched mostly in proximal 3/4, puberulent to coarsely stipitate-glandular. Leaves: blades linear-oblong to linear-lanceolate, (2–) 2.5–5 mm wide, bases truncate or rounded-auriculate, margins flat, usually entire, rarely few-toothed, faces puberulent to coarsely stipitate-glandular. Peduncles 3–11 cm. Involucres 10–17 × 15–30 mm. Ray-florets 13–21; corollas light blue to white. Style-branch appendages slightly shorter to ± equaling stigmatic lines. 2n = 12, 24.


Phenology: Flowering Apr–May(–Jun).
Habitat: Deep canyons, sands, and clays
Elevation: 1300–2000 m

Distribution

V20-932-distribution-map.gif

Utah.

Discussion

Xylorhiza linearifolia is known from Garfield, Grand, San Juan, and Wayne counties. Plants with few-toothed leaf margins may be indicative of hybridization with X. tortifolia, which is sympatric with X. linearifolia in the southern part of its range.

Selected References

None.

Lower Taxa

None.
... more about "Xylorhiza linearifolia"
RDF feed
2n chromosome quantity
24 +  and 12 +
Abaxial face pubescence
stipitate-glandular +, sparsely tomentose +  and villous +
Anther base shape
not tailed +, rounded +  and obtuse +
Anther dehiscence
introrse +
Anther fusion
connate +
Apex fusion
distinct +
Apex growth form or texture
herbaceous +
Apex size
subequal +
Apex texture
scarious +
Apical appendage quantity
0 +
Apical appendage shape
usually triangular +  and linear +
Appendage pubescence
hirsute +
Appendage relief
papillate +
Appendage shape
usually deltate +  and lanceolate +
Array architecture
spiciform +, racemiform +, paniculiform +  and corymbiform +
Array development
indeterminate +  and determinate +
Author
Guy L. Nesom +
Authority
(T. J. Watson) G. L. Nesom +
Band architecture
continuous +
Band quantity
1 +
Base shape
rounded-auriculate +  and truncate +
Basionyms
Xylorhiza glabriuscula var. linearifolia +
Blade architecture
1-nerved +
Blade shape
linear-oblong;linear-lanceolate +
Blade width
0.25 cm2.5 mm <br />0.0025 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Body architecture or pubescence or relief
smooth +
Body architecture or shape
ribbed +
Body relief
rugulose +  and muricate +
Branch arrangement or course or shape
linear +
Branch structure in adjective form
stigmatic +
Bristle architecture
barbellate +
Bristle coloration
tawny +
Bristle fragility or size
stout +
Bristle pappus duration
persistent +
Bristle quantity
30;45 +
Bristle shape
Attenuate (?) +  and Flattened (?) +
Bristle size
unequal +
Calyculus presence
absent +
Common name
Moab woody-aster +
Corolla architecture
not 2-lipped +  and actinomorphic +
Corolla coloration
light blue +  and white +
Corolla presence
absent +
Cypsela architecture
monomorphic +
Cypsela architecture or shape
4-ribbed +
Cypsela growth form
dimorphic +
Cypsela shape
fusiform +  and linear or ovoid more or less compressed +
Disc-floret quantity
30 (140) +
Disc-floret reproduction
fertile +  and bisexual +
Disc floret architecture
staminate +
Disc floret reproduction
fertile +  and bisexual +
Distribution
Utah. +
Elevation
1300–2000 m +
Embryo course
straight +
Face pubescence
puberulent +  and coarsely stipitate-glandular +
Filament fusion
distinct +
Floret architecture
pistillate +, staminate +  and neuter +
Floret atypical quantity
5;15 +
Floret position
proximal +
Floret quantity
1;5 +
Floret reproduction
bisexual +
Fruit architecture
winged +  and beaked +
Fruit condition or texture
dry +
Fruit density
dispersed +
Habitat
Deep canyons, sands, and clays +
Head architecture or arrangement
radiate +
Head arrangement
singly +
Head development
indeterminate +
Head reproduction
heterogamous +  and homogamous +
Illustration copyright
Flora of North America Association +
Illustrator
Barbara Alongi +
Individual head architecture
each +  and sessile +
Involucre atypical width
4 cm40 mm <br />0.04 m <br /> (4.8 cm48 mm <br />0.048 m <br />) +
Involucre length
1 cm10 mm <br />0.01 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
Involucre position relational
surrounding +
Involucre shape
campanulate;hemispheric +
Involucre width
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Leaf architecture
subpetiolate +  and sessile +
Leaf arrangement
alternate +
Leaf position
cauline +
Line quantity
2 +
Lobe atypical quantity
4 (5) +
Lobe orientation
spreading +
Lobe quantity
5 (?) +
Lobe shape
triangular +
Margin architecture or shape
entire +
Margin prominence or shape
flat +
Margin shape
few-toothed +
Margin texture
scarious +
Number of lower taxa
0 +
Ovary architecture
2-carpellate +
Ovary architecture or structure in adjective form
1-locular +
Ovary position
inferior +
Ovule fixation
attached +
Ovule orientation
anatropous +
Ovule quantity
1 +
Pappus duration
persistent +
Peduncle some measurement
3 cm30 mm <br />0.03 m <br /> (11 cm110 mm <br />0.11 m <br />) +
Pericarp fragility
tough +
Pericarp width
thick +
Peripheral floret presence
absent +
Peripheral floret quantity
In 1 (3+ series) +
Petal fusion
connate +
Phenology
Flowering Apr–May(–Jun). +
Phyllarie architecture
1-nerved +
Phyllarie duration
persistent +
Phyllarie fusion
distinct +
Phyllarie life cycle
falling +
Phyllarie quantity
25 (45) +
Phyllarie shape
lanceolate +
Phyllarie size
unequal +
Phyllarie texture
White-indurate (?) +
Publication title
Sida +
Publication year
2002 +
Ray-floret architecture
pistillate +
Ray-floret atypical quantity
60 (85) +
Ray-floret presence
absent +
Ray-floret quantity
13 (21) +
Ray-floret reproduction
fertile +
Receptacle architecture
epaleate +
Receptacle prominence or shape
flat +
Receptacle pubescence
bearing subulate enations +, hairy +  and bristly +
Receptacle relief
pitted +
Receptacle shape
concave;usually flat;conic +
Reference
None +
Root texture
fibrous +
Seed architecture
exalbuminous +
Seed quantity
1 +
Sepal variability
modifed +
Series atypical quantity
1 (2) +
Series quantity
2;3 +
Source xml
https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V19-20-21/V20 932.xml +
Special status
Endemic +
Stamen arrangement
alternate +
Stamen atypical quantity
4 (5) +
Stamen quantity
5 +
Stem architecture
branched +
Stem orientation
erect +
Stem pubescence
puberulent +  and coarsely stipitate-glandular +
Stigmatic line variability
equaling +
Style-branch appendage height or length or size
shorter +
Style-branch appendage shape
lanceolate +
Style-branch architecture
appendaged +  and truncate +
Style architecture
2-branched +
Style pubescence
glabrous +
Style quantity
1 +
Style relief
papillate +  and smooth +
Synonyms
Machaeranthera linearifolia +
Taxon family
Asteraceae +
Taxon name
Xylorhiza linearifolia +
Taxon parent
Xylorhiza +
Taxon rank
species +
Tube height or length or size
shorter +
Tube size or length
shorter to longer +
Volume
Volume 20 +
Whole-organism duration
perennial +
Whole organism atypical some measurement
80 cm800 mm <br />0.8 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
Whole organism growth form
subshrub +
Whole organism some measurement
15cm (35cm) +
X chromosome quantity
6 +